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Legal Proceedings - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2010 USD ($) | Dec. 31, 2012 | Jun. 29, 2012 Patents | Oct. 31, 2011 Patents | Apr. 30, 2010 Patents | Mar. 31, 2010 USD ($) | Mar. 31, 2010 ILS
Contingencies And Commitments [Line Items] |  |  |  |  |  |  |
Infringements of number of patents held |  |  | 1 | 2 | 4 |  |
Liability recorded in litigation | $ 1,300,000 |  |  |  |  |  |
Amount of ex-parte judgment |  |  |  |  |  | $ 1,700,000 | 6,300,000
Action was dismissed by the Israeli Central District Court |  | Jun. 26, 2012 |  |  |  |  |

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